Smithsonian Institution
National Museum of the American Indian: Native Words, Native Warriors
Excellent online companion site to a traveling Smithsonian Institution exhibition on the World War I & World War II American Indian Code Talkers. Features information on Native languages, boarding schools, code talking, and lesson...
Wikimedia
Wikipedia: Code Talker
This encyclopedia entry from Wikipedia explores the role of Native American code talkers during World War II. Content focuses on how the code was developed, as well as why the code remained unbroken throughout the duration of the war.
Other
Le Code Navajo
In French, read about the Navajo specialists who used their language to help defeat the Japanese in WWII. These Native Americans saved 1000s of lives with their spy code skills.